16 2.2 37.1 60.7 15 33 52 Breakdown of revenue from continuing operations by regions (%). At 52 percent, the Germany operating segment provided the largest contribu- tion to the Group’s net revenue from continuing operations in the first quarter of 2011. This was up 4 percentage points from 48 percent in the first quarter of 2010. The contribution of the Systems Solutions operating segment to net revenue from continuing operations also increased, while the Europe operat- ing segment’s contribution declined by 6 percentage points compared with the first quarter of 2010, for the aforementioned reasons. The proportion of net revenue from continuing operations generated outside Germany decreased year-on-year in the first quarter of 2011 to 39.3 percent. EBITDA. In the first three months of 2011, we generated EBITDA from continuing opera- tions of EUR 3.4 billion, down 6.7 percent compared with the first quarter of 2010. Besides a decline in operations, the negative effect was primarily attri­b­ utable to the change in the composition of the Group due to the deconsolida- tion of T-Mobile UK and the consequent loss of the company’s contribution to EBITDA of EUR 0.2 billion. Special factors of EUR 0.2 billion negatively affected EBITDA from continuing operations in the first quarter of 2011. They comprised in particular expenses for staff-related measures and non-staff-related restructuring. In the first quar- ter of 2010, EBITDA from continuing operations was also negatively impacted by EUR 0.2 billion. This mainly related to expenses of EUR 0.1 billion for staff- related measures and non-staff-related restructuring and to expenses of EUR 0.1 billion from the write-off of receivables from the German Main Customs Office for the years 2005 to 2009. Adjusted EBITDA. EBITDA from continuing operations adjusted for special factors amounted to EUR 3.6 billion in the first quarter of 2011, compared with EUR 3.9 billion in the first quarter of 2010. This was primarily due to the change in the composi- tion of the Group due to the deconsolidation of T-Mobile UK, amounting to EUR 0.2 billion. Excluding this effect, adjusted EBITDA from continuing opera- tions decreased by EUR 0.1 billion or 2.7 percent year-on-year. Contribution of the operating segments to net revenue from continuing operations (%). Germany Other countries (incl. North America) Europe (excluding Germany) Germany Systems Solutions Europe